1d1178e created the issue

Using cyberduck 2.8.5, trying to access a freebox (a net box given to subscribers by the free.fr french ISP). The freebox has an embedded ftp server. Cyberduck used to work fine with it, but now when connecting to it, it gets in a strange state where apparently no connection is open, even though the log drawer says otherwise. It seems that the lack of reply to the FEAT command throws Cyberduck off :

220 Welcome to Freebox FTP Server.
USER freebox
331 User name okay, need password.
PASS ********
230-		Bienvenue sur le serveur FTP Freebox.
230-
230-	  Vos enregistrements se trouvent dans le répertoire :
230-
230-		     /Disque dur/Enregistrements
230-
230-	   Vous pouvez mettre vos vidéos dans le répertoire :
230-
230-			  /Disque dur/Video
230-
230-
230 User logged in, proceed.
SYST
215 UNIX Type: L8
NOOP
200 Command Okay.
CWD /Disque dur
250 directory changed to /Disque dur/
FEAT
211 no-features

The main window is empty, the 'Disconnect' button is disabled, just as if no connection were open.